原子尺度下摩擦的失稳和耗散动力学（英文）  

Instability and dissipation dynamics in atomic scale friction

作　　者：李健文[1,2] 刘念华[1] 

机构地区：[1]南昌大学高等研究院,南昌330031 [2]南昌工程学院理学院,南昌330099

出　　处：《四川大学学报（自然科学版）》2017年第4期764-770,共7页Journal of Sichuan University(Natural Science Edition)

基　　金：973计划项目(2013CB934200);国家自然科学基金重点项目(10832005);国家自然科学基金(11264030)

摘　　要：采用Frenkel-Kontorova模型和基于双质量双弹簧模型的等效耦合振子模型求解了探针与基底间几种不同耦合类型的能量耗散动力学问题.发现了纳米尺度下能量耗散失稳现象,并通过平均耗散功率和粒子相对于质心的位移分析了正弦势和多阱周期性基底势两种情况下的能量耗散特性.计算结果与最近采用摩擦力显微镜观察的实验结果进行了比较.Using two different methods, Frenkel-Kontorova （FK） model and equivalent coupled-oscilla- tor model based on two-mass-two-spring model, we solve the dynamics of energy dissipation for several types of coupling between the tip and the substrate. We find the unstable energy dissipation phenome- non on the nanoscale and present a microscopic analysis of properties of energy dissipation via average power dissipated and displacement of the particles relative to the center of mass for sinusoidal potential as well as multiple-well periodic substrate potentials. The results are compared with the observations in recent experiments based on friction force microscope （FFM）.

关 键 词：纳米摩擦 耗散 失稳 摩擦力显微镜 

分 类 号：TB34[一般工业技术—材料科学与工程]